Rotary slip for drilling oil wells



Nov. 3, 1925. 1,559,932

c. J. BOGEN l ROTARY SLIP FOR DRILLING' L WELLS Filed May 14. 1924 l CLfles cf Bogeny www MMS Patented Nov. 3, 1925.

'CHARLES J'. BOGEN, OF HUNTINGTON' BEACH, CACI'JIE'OR'N'IA` ROTARY sur ron nnILnINe on. WELLS.

applicati@ med nay 14,

To all whom'z't may concern: Y

. Beit known that'l, CHARLES J. BoGEN, a citizen of the United States, residing at Huntington Beach, in the county of Orange and State of California, have invented new and useful Improvements in Rotary Slips. for Drilling Oil Wells, of which the following is a specification.

This invention relates to slips 'for wells, said slips being used to grip the drill pipe when pulling out from or running into the well a string of drill pipes.

- An object of lthis invention is the provision of a slip having formed thereon both substantially vertical and substantially horizontal teeth, the latter being employed to hold a string of pipe atA any desired verticalposition, and the former being used to grip .the pipe toprevent rotation thereof when'screwing ao her pipe length on to it or unscrewing ano her pipe leno'th from it.

Another object'of this invention is the provision. pf substantially vertical teeth on the back or convex side of a slip, said teeth being adapted to prevent the 'rotationl of the slip in the bushing in which it is placed.

With the foregoing objects in view, together with suchother objects and advantages as may subsequently appear, this invention consists in the construction and arrangement of parts hereinafter described and claimed and illustrated in the accompanying drawings. in which:`

Figure 1 is an elevational view of` a fragment of a drill pipe, shown as being held in suspension by my improved slips, the slips being shown in relation to a table bushing, which is inserted in a square holein a rotary table, which is used for rotating the drill pipe when drilling,

Fig. 2 is a plan view taken on the line 2-2 of Fig. 1,

Fig. 3 is' an elevational vie-w of my improved slip, the view taken from the concave side, and

Fig. 4 is a plan view of Fig. 3.

Referring to the drawings for a more detailed description thereof, the slip of my invention, best shown in Fig. 3, comprises a lower section 5 and an upper sectiong6, each section being arcuate in cross section, having a tapered curved outer surface, and tapered in vertical section, and secured to ether. The section 5 has a curved inner sur a'ce on which are `formed gripping teeth 9 adapted to t the curve of a dr1ll pipe 10, lshown in 1924. Serial'lo. 118,213.

Fig. 1. The teeth 9 aresubstantiallv horizontal. The section 6 has acurv surface on which are formed teeth 11 adapted to gripthe drill pipe 10. The teeth 11 are substantially vertlcal. which are substantially vertical, are formed on the outer curved surface of the section 6. The section 5 has anarcuate tongue 12 formed in the middle of, its upper end and this tongue fits into a corresponding recess in the section 6. Threaded bolts 13 extend through-.the'section 6 into the section 5, as clearly shown in Fig. 1, and serve to secure the two sections of the sliptogether.

inner The upper end ofthe section 6 is provided with a handle 14. rI lhe use4 of ymy slips as illustrated in Figs. 1 and 2, there Vbeing three slipsemployed to grip the drill pi e.

l1,0, these slips being arranged around t e pipe.` The slips are set into a table bushing 15 which is held in any suitable manner in a square vertical ,aperturel extending through a rotary table 16.

It will be readily seen that thehorizontalv v'teeth `9 formed on the slips of my invention will serve to hold the drillipipe 10, and

therefore the other pipes in `fai'string, at anyl desiredk depth i'nlthewell. This y,isnecessary when'taking the gpife .lengths a pulling a string offv rill' PPeso' and when vputting fthe sectlongs; i ,drill pipes together whenv running-the s a well. It will alsovbeappregiated thatthe vertical teeth 11 formed onthe sectionfwill prevent the rotation of thefpipe gripped 'hyr ,l

the slips and that the teeth-11?'` formed on the outer surface of the section 6 will prevent i the rotation of the slips in the'bushing `15.

A very advantageous feature of. the im proved slip resides in the particular con` struction and arrangement of the teeth thereon. As clearly shown upon the drawling, the upper surfaces of the horizontal teeth 9 are substantially horizontal, so

that they present horizontalshoulders yon thev upper sides of each tooth. The vertical teeth 11` are divided into two serieswhich have the` appearance of being pointedin opposite directions. In a similar manner the vertical teeth 11* on the outside of the slip present the appearance of being pointed toward the opposite ends of the body -of the slip lThe reason why these series of teeth appearto be so'pointed resides -in thel fact thatthe vright hand sides of the right hand series of' the vertical teeth 11, as shown in Fig 4, extend radially from the center of curvature of the body ofthe slip. The left hand sides of the left hand series of the vertical teeth 11 also and left hand ends of the body of the si movement.

In a similar manner the two series of teet forming the outside teeth 11a have one side of each tooth radial from the center of curvature of the slip. so that these radiall extending surfaces are exposed towar the ends of the body. `The advantage of havlng the teeth so arranged is that when the edges of the teeth dig into the pipel or the rotary table, the portions of the pipe become marred and form projections Which rest on surfaces at right angles to the directions of This is a more advantageous construction than ie the teeth both horizontal and vertical were V-shaped in form. In such cases the marred material of the pipe 10 or the table engage upon inclined shoulders and tend to slip off.

In taking two sections o--pipes apart, the slips are taken out of the bushing 15and the string of pipe is lifted until the pipe joint is above the table 16 at any suitable height. The slips are then put into the bushing 15. The pipe section which is to be taken off the pipe string may then be held against rotation while the table 16 is rotated to unthread the sectionsfrom each other.

In screwing "tw sections of the pi e together, the rotary table 16 is rotated in t e proper direction while the pipe above the table is held against rotation.

It is to be understood that while I have shown my improved -slps as positioned in a bushing. whichl is generally not used in practice, the slips of my invention may be seated directly in the turntable, as are those of the prior art. t

This invention has been described, but modifications thereof may`be devised without departing from the spirit thereof, and it is to be understood that such modifications come within the scope of this invention.

What is claimed is:

1. A slip for wells composed of u er and lower sections` horizontal teeth formed upon the'inside surface of the lower section, and vertical teeth formed. upon the inside and outside surfaces of the upper section.-

2. A pipe slip for wells comprising an arcuate body having a series of substantially horizontal teeth and a series of vertical teeth formed upon the interior surface 'thereof the horizontal teeth having their upper sides formed to present substantially horizontal'shoulders, and each of the vertical teeth having one side presenting a surface extendin radially from the center of curvature of t e body.

3. A pi e slip for lwells comprising an arcuate body having a-series of vertical teeth formed upon the interior and exterior sur- -faces thereof, each tooth f each series having one side presenting a surface extending racclially from the center of curvature of the to y. l

4. A pipe slip for wells comprising an arcuate body having two series of vertical teeth formed upon the interior surface thereof. each tooth of each series havingone side presenting a surface extending radlally frbm the center of curvature offsaid body,the

mentioned sides of the teeth on one series being exposed toward oney end of the body and the mentioned sides upon the other series being exposed toward the,- other sides of said body. l

5. A pipe slip for wells comprising an arcuate body having two series of vertical teeth formed upon the exterior surface thereof, each tooth of each series having one side presenting a'surface extending radially from the center of curvature of said body,

the mentioned sides of the teeth on one series being exposed toward one end of the body and the mentioned sides upon the other series llgeing exposed toward the other sides of said 6. A pipe slip for wells comprising an arcuate body having two series of vertical teeth formed upon the interior and exterior surfaces thereof, one of the series of teeth upon the interior and exterior surfaces-*having sides extending radially from the center of curvature of the body and being exposed toward one end of the body, the other series of teeth upon the interior and exterior surfaces having sides which extend radially from the center of curvature of the body but 4are exposed toward the other. end of the body.

7. A pipe slip for wells comprising an arcuate body having a series' of substantially horizontal teeth, the upper sides of which are substantially horizontal, and having two series of vertical teeth formed upon the interior and exterior surfaces thereof, one of the series of teeth upon the interior and exterior surfaces having sides extending radially from the center of curvature of the body and being exposed toward one end of the body,.the other series of teeth upon the interior and exterior vsurfaces having sides which extend radially from the center of curvature of the body but are exposed toward the other end ofthe body.

In testimony whereof I have signed my name to this specification.

CHARLES J. BOGEN. 

